"It is the second time that when I try to file electronically the system show an error that the file has a SSN or a EIN that has been previously filed, HELP to SOLVE"

If a return has already been filed with that SSN, your only option is to paper file the return.....seems a common theme these days that people got impatient waiting for their stimulus money and used the non-filer site which screws up the Efiling of their actual tax return.